Bump @babel/runtime from 7.11.2 to 7.12.0 in /token-swap/js (#634)

Bumps [@babel/runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-runtime) from 7.11.2 to 7.12.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.0/packages/babel-runtime)

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token-swap/js/package-lock.json

@@ -1369,9 +1369,9 @@
       }
     },
     "@babel/runtime": {
-      "version": "7.11.2",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.11.2.tgz",
-      "integrity": "sha512-TeWkU52so0mPtDcaCTxNBI/IHiz0pZgr8VEFqXFtZWpYD08ZB6FaSwVAS8MKRQAP3bYKiVjwysOJgMFY28o6Tw==",
+      "version": "7.12.0",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.12.0.tgz",
+      "integrity": "sha512-lS4QLXQ2Vbw2ubfQjeQcn+BZgZ5+ROHW9f+DWjEp5Y+NHYmkRGKqHSJ1tuhbUauKu2nhZNTBIvsIQ8dXfY5Gjw==",
       "requires": {
         "regenerator-runtime": "^0.13.4"
       }